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83f4e4b65a
* Add support for uniquing strings in the remark streamer and emitting the string table in the remarks section.
* Add parsing support for the string table in the RemarkParser.
From this remark:
```
--- !Missed
Pass: inline
Name: NoDefinition
DebugLoc: { File: 'test-suite/SingleSource/UnitTests/2002-04-17-PrintfChar.c',
Line: 7, Column: 3 }
Function: printArgsNoRet
Args:
- Callee: printf
- String: ' will not be inlined into '
- Caller: printArgsNoRet
DebugLoc: { File: 'test-suite/SingleSource/UnitTests/2002-04-17-PrintfChar.c',
Line: 6, Column: 0 }
- String: ' because its definition is unavailable'
...
```
to:
```
--- !Missed
Pass: 0
Name: 1
DebugLoc: { File: 3, Line: 7, Column: 3 }
Function: 2
Args:
- Callee: 4
- String: 5
- Caller: 2
DebugLoc: { File: 3, Line: 6, Column: 0 }
- String: 6
...
```
And the string table in the .remarks/__remarks section containing:
```
inline\0NoDefinition\0printArgsNoRet\0
test-suite/SingleSource/UnitTests/2002-04-17-PrintfChar.c\0printf\0
will not be inlined into \0 because its definition is unavailable\0
```
This is mostly supposed to be used for testing purposes, but it gives us
a 2x reduction in the remark size, and is an incremental change for the
updates to the remarks file format.
Differential Revision: https://reviews.llvm.org/D60227
llvm-svn: 359050
65 lines
2.0 KiB
C++
65 lines
2.0 KiB
C++
//===-- llvm/Remarks/Remark.h - The remark type -----------------*- C++/-*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file provides an interface for parsing remarks in LLVM.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_REMARKS_REMARK_PARSER_H
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#define LLVM_REMARKS_REMARK_PARSER_H
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Remarks/Remark.h"
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#include "llvm/Support/Error.h"
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#include <memory>
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namespace llvm {
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namespace remarks {
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struct ParserImpl;
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/// Parser used to parse a raw buffer to remarks::Remark objects.
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struct Parser {
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/// The hidden implementation of the parser.
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std::unique_ptr<ParserImpl> Impl;
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/// Create a parser parsing \p Buffer to Remark objects.
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/// This constructor should be only used for parsing YAML remarks.
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Parser(StringRef Buffer);
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/// Create a parser parsing \p Buffer to Remark objects, using \p StrTabBuf as
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/// string table.
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/// This constructor should be only used for parsing YAML remarks.
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Parser(StringRef Buffer, StringRef StrTabBuf);
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// Needed because ParserImpl is an incomplete type.
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~Parser();
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/// Returns an empty Optional if it reached the end.
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/// Returns a valid remark otherwise.
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Expected<const Remark *> getNext() const;
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};
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/// In-memory representation of the string table parsed from a buffer (e.g. the
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/// remarks section).
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struct ParsedStringTable {
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/// The buffer mapped from the section contents.
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StringRef Buffer;
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/// Collection of offsets in the buffer for each string entry.
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SmallVector<size_t, 8> Offsets;
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Expected<StringRef> operator[](size_t Index);
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ParsedStringTable(StringRef Buffer);
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};
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} // end namespace remarks
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} // end namespace llvm
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#endif /* LLVM_REMARKS_REMARK_PARSER_H */
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